Per daugiau nei dvide\u0161imt met\u0173, kai keramikos gamykloms, mineralini\u0173 med\u017eiag\u0173 perdirbimo \u012fmon\u0117ms ir specializuotoms chemijos \u012fmon\u0117ms parinkau \u0161lifavimo med\u017eiagas, supratau, kad pigiausia terp\u0117 retai b\u016bna ekonomi\u0161kiausia. Aliuminio oksido \u0161lifavimo rutuliukai yra naudingas tarpinis variantas, kai na\u0161umas, u\u017eter\u0161tumo kontrol\u0117 ir bendra nuosavyb\u0117s kaina i\u0161 tikr\u0173j\u0173 sutampa. Jie n\u0117ra patys kie\u010diausi ar lengviausi rinkoje, ta\u010diau daugumoje \u0161lapiojo ir sausojo malimo darb\u0173, kuriuose man teko dalyvauti, jie duoda labiausiai nusp\u0117jamus rezultatus per ilg\u0105 laik\u0105.<\/p>\n
\u0160ie rutuliukai gaminami i\u0161 aliuminio oksido, paprastai nuo 92 % iki 99 % Al\u2082O\u2083. Kuo didesnis aliuminio oksido kiekis, tuo didesnis atsparumas dilimui ir ma\u017eesn\u0117 priemai\u0161\u0173 patekimo rizika. Gamyba prasideda nuo kruop\u0161\u010diai sumalt\u0173 aliuminio oksido milteli\u0173, kurie sumai\u0161omi su nedideliais sukepinimo pagalbini\u0173 med\u017eiag\u0173 kiekiais. Tada milteliai valcuojant arba izostati\u0161kai presuojant formuojami \u012f sferas, d\u017eiovinami ir degami gerokai auk\u0161tesn\u0117je nei 1500 \u00b0C temperat\u016broje. Sukepinimo metu dalel\u0117s susijungia \u012f tanki\u0105, smulkiagr\u016bd\u0119 strukt\u016br\u0105, pasi\u017eymin\u010di\u0105 labai ma\u017eu por\u0117tumu. Gatav\u0173 rutuliuk\u0173 dydis b\u016bna nuo ma\u017edaug 3 mm iki 80 mm ar didesnis, priklausomai nuo mal\u016bno skersmens ir norimo daleli\u0173 dyd\u017eio.<\/p>\n
Gamykloje svarbiausia, kaip \u0161ios savyb\u0117s pasirei\u0161kia kasdien\u0117je veikloje. Aliuminio oksido rutuliuk\u0173 kietumas yra apie 9 pagal Moso skal\u0119, o tai yra pakankamai auk\u0161tas rodiklis, kad b\u016bt\u0173 galima veiksmingai malti kvarc\u0105, feld\u0161pat\u0105, cirkon\u0105 ir daugel\u012f r\u016bd\u0173. J\u0173 t\u016brinis tankis yra 3,6-3,9 g\/cm\u00b3, tod\u0117l kiekvienas rutuliukas pasi\u017eymi gera sm\u016bgio energija ir n\u0117ra pernelyg sunkus. Dilimo greitis \u0161lapiojo malimo metu paprastai yra labai ma\u017eas - \u012fprastomis s\u0105lygomis da\u017enai ma\u017eesnis nei 0,02 % per valand\u0105, o tai rei\u0161kia, kad terp\u0117s \u012fkrova tarnauja ilgiau, o mal\u016bno \u012fd\u0117klas patiria ma\u017eiau agresyvaus dilimo. Kadangi med\u017eiaga yra chemi\u0161kai inerti\u0161ka, ji nereaguoja su daugeliu r\u016bg\u0161\u010di\u0173, \u0161arm\u0173 ar organini\u0173 jungini\u0173 ir prakti\u0161kai neprideda gele\u017eies ar kit\u0173 metalini\u0173 ter\u0161al\u0173. Pastarasis aspektas labai svarbus \u0161lifuojant keramikos korpusus ar glaz\u016bras, kai net ir nedidelis gele\u017eies kiekis gali pakeisti spalv\u0105 arba sukelti i\u0161degto gaminio defektus.<\/p>\n
Daug kart\u0173 ma\u010diau praktin\u012f skirtum\u0105. Vienoje glaz\u016bros gamykloje, per\u0117jus nuo kvarco akmenuk\u0173 prie 95 % aliuminio oksido rutuliuk\u0173, malimo laikas sutrump\u0117jo ma\u017edaug 25 %, kartu pager\u0117jo partijos pastovumas. Akmenukai d\u0117v\u0117josi netolygiai ir kartais suskilin\u0117davo, tod\u0117l likdavo stambi\u0173 daleli\u0173, kurias reik\u0117davo atsijoti. Aliuminio oksido rutuliukai ilgiau i\u0161liko apval\u016bs, o j\u0173 daleli\u0173 dydis pasiskirst\u0117 tiksliau. Mineralini\u0173 med\u017eiag\u0173 malimo grandin\u0117je, kurioje apdorojamas kvarcinis sm\u0117lis, ta pati terp\u0117 suma\u017eino gele\u017eies pa\u0117mim\u0105 iki ma\u017eesn\u0117s nei aptinkama ribos, tod\u0117l nereik\u0117jo atlikti papildomo magnetinio atskyrimo etapo tolesn\u0117je grandin\u0117je. Tokia nauda greitai susikaupia, kai vis\u0105 par\u0105 veikia keli mal\u016bnai.<\/p>\n
\u017dinoma, aliuminio oksido rutuliukai n\u0117ra tinkamas sprendimas kiekvienai paskir\u010diai. J\u0173 kilogramas kainuoja brangiau nei plienini\u0173 rutuliuk\u0173 ar pagrindin\u0117s keramin\u0117s terp\u0117s, tod\u0117l paprastai tai pateisinama ma\u017eesniu u\u017eter\u0161tumu, ilgesniu terp\u0117s tarnavimo laiku arba ma\u017eesn\u0117mis energijos s\u0105naudomis vienai tonai produkto. Labai smarkiai sm\u016bgiuojant sausuoju b\u016bdu malant itin kietas r\u016bdas, d\u0117l didesnio tankio ir tvirtumo vis dar gali b\u016bti pasirenkamos cirkonio arba plieno terp\u0117s. Aliuminio oksido rutuliukai taip pat gali suskilti arba sul\u016b\u017eti, jei mal\u016bnas ilg\u0105 laik\u0105 veikia tu\u0161\u010dias arba jei \u012f jo \u012fkrov\u0105 patenka pa\u0161alini\u0173 metalini\u0173 objekt\u0173, tod\u0117l svarbu gerai pri\u017ei\u016br\u0117ti mal\u016bn\u0105 ir tinkamai j\u012f pakrauti.<\/p>\n
Pasirinkimo ir veikimo detal\u0117s daro pastebim\u0105 skirtum\u0105. Da\u017ena klaida - visam u\u017etaisui naudoti vieno dyd\u017eio rutuliuk\u0105. Veiksmingiausiose sistemose naudojamas laipsni\u0161kas \u012fkrovimas - didesni rutuliukai pradiniam smulkinimui ir vis ma\u017eesni smulkiam malimui. Taip pat reikia steb\u0117ti rutuliuk\u0173 ir med\u017eiagos santyk\u012f bei suspensijos klampum\u0105 dr\u0117gnuosiuose mal\u016bnuose; pernelyg klampi suspensija gali amortizuoti rutuliukus ir suma\u017einti malimo efektyvum\u0105. Reguliariai tikrinant rutuliuk\u0173 nusid\u0117v\u0117jim\u0105 ir retkar\u010diais papildant \u012fkrova i\u0161laikomas geriausias jos veikimas. Paprastai rekomenduoju vietoje laikyti nedideles da\u017eniausiai naudojam\u0173 dyd\u017ei\u0173 atsargas, kad mal\u016bnams nereik\u0117t\u0173 dirbti su i\u0161eikvota ar prastai r\u016b\u0161iuota \u012fkrova laukiant pristatymo.<\/p>\n
Tvarkymas nesud\u0117tingas, ta\u010diau j\u012f verta atlikti atid\u017eiai. Prie\u0161 pakraunant naujus kamuoliukus reik\u0117t\u0173 patikrinti, ar jie n\u0117ra \u012ftr\u016bk\u0119 arba suskil\u0119. \u012ekraunant mal\u016bn\u0105, geriausia juos pilti palaipsniui, mal\u016bnui l\u0117tai sukantis, o ne i\u0161 karto i\u0161pilti vis\u0105 \u012fkrov\u0105. Po kampanijos nusid\u0117v\u0117jusius rutuliukus da\u017enai galima atsijoti ir v\u0117l panaudoti kitame mal\u016bne, kuriame toleruojamos \u0161iek tiek ma\u017eesn\u0117s terp\u0117s.<\/p>\n
\u017dvelgiant pla\u010diau, aliuminio oksido \u0161lifavimo rutuliukai puikiai atitinka dabartin\u012f spaudim\u0105 ma\u017einti energijos suvartojim\u0105 ir atliek\u0173 kiek\u012f. Kadangi jie d\u0117visi l\u0117tai, panaudotos terp\u0117s kiekis, kur\u012f reikia i\u0161mesti arba perdirbti, yra ma\u017eesnis nei naudojant daugel\u012f alternatyv\u0173. J\u0173 pastovus veikimas taip pat padeda gamykloms i\u0161laikyti pastov\u0173 na\u0161um\u0105, o tai netiesiogiai suma\u017eina energijos \u0161vaistym\u0105 paleidimo ir sustabdymo cikl\u0173 metu.<\/p>\n
Galiausiai aliuminio oksido \u0161lifavimo rutuliukai i\u0161lieka populiar\u016bs, nes jie padeda i\u0161spr\u0119sti problemas, kurios i\u0161 tikr\u0173j\u0173 svarbios veikian\u010diose gamyklose: ma\u017eas u\u017eter\u0161tumas, nusp\u0117jamas nusid\u0117v\u0117jimas ir priimtinos bendros s\u0105naudos per vis\u0105 \u012fkrovos eksploatavimo laikotarp\u012f. Jie nepakeis vis\u0173 kit\u0173 tip\u0173 med\u0163iag\u0173, ta\u010diau kai j\u016bs\u0173 procese \u0161varumas ir pastovumas vertinami tiek pat, kiek \u0163alias malimo greitis, jie i\u0161lieka vienas prakti\u0161kiausi\u0173 pasirinkim\u0173. Jei vertinate naujam ar jau veikian\u010diam mal\u016bnui skirtas laikmenas, tinkamai suprojektuotas bandymas su tikra \u017ealiava vis dar yra geriausias b\u016bdas patvirtinti ekonomi\u0161kum\u0105 konkre\u010diomis s\u0105lygomis.<\/p>","protected":false},"excerpt":{"rendered":"
After more than twenty years specifying grinding media for ceramics plants, mineral processors, and specialty chemical operations, I\u2019ve learned that […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[6],"tags":[],"class_list":["post-432","post","type-post","status-publish","format-standard","hentry","category-alumina-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/posts\/432","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/comments?post=432"}],"version-history":[{"count":1,"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/posts\/432\/revisions"}],"predecessor-version":[{"id":433,"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/posts\/432\/revisions\/433"}],"wp:attachment":[{"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/media?parent=432"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/categories?post=432"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminaceramics.net\/lt\/wp-json\/wp\/v2\/tags?post=432"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}